Air conditioner



FIG. 1 is a top view of the air conditioner;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a perspective view thereof;

FIG. 6 is a right view thereof; and,

FIG. 7 is a left view thereof.

The broken line disclosure represents portions of the air conditioner which form no part of the claimed design. 

CLAIM The ornamental design for an air conditioner, as shown and described. 